battery FORD MUSTANG 2003 Workshop Manual

Deactivate the system means to perform the deactivation procedure. Refer to Deactivation Procedure
in this section.
Prove Out the System
Prove out the system means to turn the ignition switch from the OFF to the RUN position and visually
monitor the air bag indicator with the air bag modules installed. Refer to Prove Out Procedure in this
section.
Reactivate the System
Reactivate the system means to perform the reactivation procedure. Refer to Reactivation Procedure
in this section.
Reconnect the System
Reconnect the system means to reconnect all system components. Refer to Air Bag System
Reconnect Checklist in this section.
Install a New Component
Install a new component means to remove the existing component and install a new authorized part
obtained from Ford Customer Service Division.
Verify the System
Verify the system means to prove out the system with restraint system diagnostic tools for the air bag
modules in place of components.
Air Bag System Reconnect Checklist
The checklist below should be completed following diagnosis or repair of any air bag system concern.
1. Is the connector at the base of the steering column connected?
2. Are the air bag modules connected?
3. Is the restraints control module (RCM) connected?
4. Is the vehicle battery connected? Klj . 5 ba
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2. Turn the ignition switch to the RUN position.
3. Follow manufacturer's instructions for the scan tool being used.
4. PIDs are continuously updated on the display.
Active Commands
This command allows the technician to verify operation of the air bag indicator and chime. When the
air bag output command is executed, the indicator and the chime are activated simultaneously for
approximately four seconds. Both devices are deactivated automatically.
Restraints Control Module (RCM) Diagnostic Trouble Code (DTC) Priority Table DTC
a LFC
b LFC
Priority Description Action To
Take — — 1 The Air Bag Indicator is Illuminated Continuously —
RCM
Disconnected, Inoperative, or Lost/Low Ignition Feed Go To Pinpoint
Test A .
B1342 24 2 RCM Is Faulted INSTALL a
new RCM.
B1231 19 3 RCM Crash Data Memory Full INSTALL a
new RCM.
B1921 21 4 RCM Bracket Ground Resistance High Go To Pinpoint
Test B .
C1414 29 5 Incorrect Vehicle Identification Code Go To Pinpoint
Test C .
B1887 15 6 Driver Air Bag Circuit Shorted to Ground Go To Pinpoint
Test D .
B1916 15 7 Driver Air Bag Circuit Shorted to Battery or Ignition Go To Pinpoint
Test E .
B1888 16 8 Passenger Air Bag Circuit Shorted to Ground Go To Pinpoint
Test F .
B1925 16 9 Passenger Air Bag Circuit Shorted to Battery or Ignition Go To Pinpoint
Test G .
B1932 32 10 Driver Air Bag Circuit Resistance High Go To Pinpoint
Test H .
B1933 33 11 Passenger Air Bag Circuit Resistance High Go To Pinpoint
Test I .
B1934 34 12 Driver Air Bag Circuit Resistance Low Go To Pinpoint
Test J .
B1935 35 13 Passenger Air Bag Circuit Resistance Low Go To Pinpoint
Test K .
B1892 — 17 Air Bag Tone Warning Indicator Circuit Shorted to
Ground or Open Go To Pinpoint
Test L .
B1891 — 18 Air Bag Tone Warning Indicator Circuit Shorted to Battery
or Ignition Go To Pinpoint
Test M .
B1869 Tone
c 19 Air Bag Indicator Inoperative Go To Pinpoint
Test N .
B1870 Tone
c 20 Air Bag Indicator Shorted to Battery Go To Pinpoint
Test O . Klj . 3 ba
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Pinpoint Test E: LFC 15/DTC B1916 —
Driver Air Bag Circuit Shorted to Battery or Ignition
Normal Operation
The restraints control module (RCM) checks for driver air bag circuit shorts to battery or ignition by
monitoring the voltage of circuit 614 (GY/OG) and 615 (GY/WH) at pins 3 and 4. If the RCM detects a
short to battery or ignition on either of these pins, it will store a diagnostic trouble code (DTC) B1916 in
memory and flash a lamp fault code (LFC) 15 (or higher priority code if one exists) on the air bag
indicator.
Possible Causes D5 CHECK FOR AN INTERMITTENT FAULT
z
Refer to the continuous DTCs recorded during Step D1.
z Was the continuous DTC retrieved during Step D1 an
intermittent fault? Yes
CHECK for causes
of intermittent short
to ground on circuit
614 (GY/OG),
circuit 615
(GY/WH), and the
clockspring
assembly. Attempt
to recreate the hard
fault by flexing the
wire harness and
cycling the ignition
key frequently.
REPAIR any
intermittent
concerns found.
GO to
D6 .
No
GO to D6 .
D6 CHECK FOR ADDITIONAL DTCs
z
Refer to continuous DTCs recorded during Step D1.
z Were any continuous DTCs retrieved during Step D1? Yes
Do not clear any
DTCs until all DTCs
have been
resolved. GO to the
Restraints Control
Module (RCM)
Diagnostic Trouble
Code (DTC) Priority
Table in this section
for pinpoint test
direction.
No
RECONNECT the
system.
REACTIVATE the
system. PROVE
OUT the system.
REFER to
Air Bag Supplemental
Restraint System
(SRS) in this
section. CLEAR all
DTCs. Klj . 12 ba
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A driver air bag circuit short to battery or ignition can be caused by:
za short to battery or ignition on circuit 614 (GY/OG).
z a short to battery or ignition on circuit 615 (GY/WH).
z a short to battery or ignition on the clockspring.
z a short to battery or ignition on the driver air bag module.
z an RCM internal concern.
PINPOINT TEST E: LFC 15/DTC B1916 — DRIVER AIR BAG CIRCUIT
SHORTED TO BATTERY OR IGNITION Test Step Result / Action to
Take E1 CHECK FOR A HARD OR INTERMITTENT DTC
z
Key in OFF position.
z Connect the diagnostic tool. Scan Tool
z Key in ON position.
z Enter the following diagnostic mode on the diagnostic tool:
Retrieve/Clear Continuous DTCs.
z Retrieve and record any continuous DTCs for use later in this
pinpoint test.
z Enter the following diagnostic mode on the diagnostic tool: On-
Demand Self Test.
z Was DTC B1916 retrieved during the on- demand self test? Yes
This is a hard fault.
The fault condition
is still present. This
fault cannot be
cleared until it is
corrected and the
DTC is no longer
retrieved during the
on-
demand self
test. GO to E2 .
No
This in an
intermittent fault.
The fault condition
is not present at this
time. GO to E5 .
E2 CHECK THE DRIVER AIR BAG MODULE
WARNING: If the supplemental restraint system (SRS) is
being serviced, the system must be deactivated and restraint
system diagnostic tools must be installed. Refer to Air Bag Supplemental Restraint System (SRS) in this section.
The air bag restraint system diagnostic tools must be removed
and the air bag modules reconnected when the system is
reactivated to avoid non- deployment in a collision, resulting in
possible personal injury. NOTE: Diagnostics or repairs are not to
be performed on a seat equipped with a seat side air bag with the
seat in the vehicle. Prior to attempting to diagnose or repair a seat
concern when equipped with a seat side air bag, the seat must be
removed from the vehicle and the restraint system diagnostic tools
must be installed in the seat side air bag electrical connectors. The
restraint system diagnostic tools must be removed prior to
operating the vehicle over the road. NOTE: After diagnosing or
repairing an SRS, the restraint system diagnostic tools must be
removed before operating the vehicle over the road. NOTE:
After diagnosing or repairing a seat system, the restraint system
diagnostic tools must be removed before operating the vehicle Yes
GO to
E3 .
No
INSTALL a new
driver air bag
module. GO to E6 . Klj . 13 ba
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over the road. NOTE:
The SRS must be fully operational and free
of faults before releasing the vehicle to the customer.
z Key in OFF position.
z Deactivate the system. Refer to Air Bag Supplemental Restraint System (SRS) in the Diagnosis and Testing portion of this section.
z Key in OFF position.
z Key in ON position.
z Enter the following diagnostic mode on the diagnostic tool: On-
Demand Self Test.
z Was DTC B1916 retrieved? E3 CHECK THE DRIVER AIR BAG MODULE CIRCUIT
z
Key in OFF position.
z Disconnect: Driver Air Bag Module Restraint System Diagnostic
Tool.
z Disconnect: RCM C2041.
z Key in ON position.
z NOTE: Do not separate or remove shorting bars from RCM C2041.
z Measure the voltage between RCM C2041 pin 3, circuit 614
(GY/OG), harness side and ground; and between RCM C2041 pin 4,
circuit 615 (GY/WH), harness side.
z Are the voltages less than 0.2 volt? Yes
INSTALL a new
RCM. GO to
E6 .
No
GO to E4 .
E4 CHECK THE DRIVER AIR BAG MODULE WIRING AND THE
CLOCKSPRING z
Disconnect: Clockspring C218b.
z Inspect all crimps, terminals, wires and connectors in circuit 614
(GY/OG) feeding the RCM pin 3, circuit 615 (GY/WH) feeding pin 4,
and the clockspring C218b. Check for pinched wires and damaged
connector pin terminals.
z Was any damage found? Yes
REPAIR as
necessary. GO to
E6
.
No
GO to E6 .
E5 CHECK FOR AN INTERMITTENT FAULT
z
Refer to the continuous DTCs recorded during Step E1.
z Was the continuous DTC retrieved during Step E1 an
intermittent fault? Yes
CHECK for causes
of intermittent short
to battery or ignition
on circuit 614
(GY/OG), circuit
615 (GY/WH), and
the clockspring
assembly. Attempt
to recreate the hard
fault by flexing the
wire harness and
cycling the ignition
key frequently.
REPAIR any
intermittent
concerns found. GO Klj . 14 ba
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Pinpoint Test G: LFC 16/DTC B1925 —
Passenger Air Bag Circuit Shorted to Battery or Ignition
Normal Operation
The restraints control module (RCM) checks for passenger air bag circuit shorts to battery or ignition
by monitoring the voltage of circuits 607 (LB/OG) and 616 (PK/BK) at pins 6 and 7. If the RCM detects
a short to battery or ignition on either of these pins, it will store a diagnostic trouble code (DTC) B1925
in memory and flash a lamp fault code (LFC) 16 (or higher priority code if one exists) on the air bag
indicator.
Possible Causes
A passenger air bag circuit short to battery or ignition can be caused by:
za short to battery or ignition on circuit 607 (LB/OG).
z a short to battery or ignition on circuit 616 (PK/BK).
z a short to battery or ignition on the passenger air bag module.
z an RCM internal concern.
PINPOINT TEST G: LFC 16/DTC B1925 — PASSENGER AIR BAG
CIRCUIT SHORTED TO BATTERY OR IGNITION REACTIVATE the
system. PROVE
OUT the system.
REFER to
Air Bag Supplemental
Restraint System
(SRS) in this
section. CLEAR all
DTCs. Test Step Result / Action to
Take G1 CHECK FOR A HARD OR INTERMITTENT DTC
z
Key in OFF position.
z Connect the diagnostic tool. Scan Tool
z Key in ON position.
z Enter the following diagnostic mode on the diagnostic tool:
Retrieve/Clear Continuous DTCs.
z Retrieve and record any continuous DTCs for use later in this
pinpoint test.
z Enter the following diagnostic mode on the diagnostic tool: On-
Demand Self Test.
z Was DTC B1925 retrieved during the on- demand self test? Yes
This is a hard fault.
The fault condition
is still present. This
fault cannot be
cleared until it is
corrected and the
DTC is no longer
retrieved during the
on-
demand self
test. GO to G2 .
No
This is an
intermittent fault.
The fault condition
is not present at
this time. GO to
G5 . Klj . 18 ba
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Pinpoint Test H: LFC 32/DTC B1932 —
Driver Air Bag Circuit Resistance High
Normal Operation
The restraints control module (RCM) monitors the resistance for the driver air bag ignitor by measuring
the resistance between pins 3 and 4. If the RCM detects high resistance between these pins, it will
store a diagnostic trouble code (DTC) B1932 in memory and flash a lamp fault code (LFC) 32 (or higher priority code if one exists) on the air bag indicator. No
GO to
G6 .
G5 CHECK FOR AN INTERMITTENT FAULT
z
Refer to the continuous DTCs recorded during Step G1.
z Was the continuous DTC retrieved during Step G1 an
intermittent fault? Yes
CHECK for causes
of intermittent short
to battery or
ignition on circuit
607 (LB/OG) and
circuit 616 (PK/BK).
Attempt to recreate
the hard fault by
flexing the wire
harness and
cycling the ignition
key frequently.
REPAIR any
intermittent
concerns found.
GO to
G6 .
No
GO to G6 .
G6 CHECK FOR ADDITIONAL DTCs
z
Refer to the continuous DTCs recorded during Step G1.
z Were any continuous DTCs retrieved during Step G1? Yes
Do not clear any
DTCs until all
DTCs have been
resolved. GO to the
Restraints Control
Module (RCM)
Diagnostic Trouble
Code (DTC)
Priority Table in
this section for
pinpoint test
direction.
No
RECONNECT the
system.
REACTIVATE the
system. PROVE
OUT the system.
REFER to
Air Bag Supplemental
Restraint System
(SRS) in this
section. CLEAR all
DTCs. Klj . 20 ba
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Pinpoint Test M: DTC B1891 —
Air Bag Tone Warning Indicator Circuit Shorted to Battery or
Ignition
Normal Operation
The restraints control module (RCM) monitors its connection to the generic electronic module (GEM) at
pin 10. This connection is used to signal a chime if the air bag indicator is inoperative and another SRS
fault exists. If the RCM detects a short to battery or ignition on the connection to the GEM, it will store
a diagnostic trouble code (DTC) B1891 in memory.
Possible Causes z
Is the voltage less than 1.0 volt? L5 CHECK FOR AN INTERMITTENT FAULT
z
Refer to the continuous DTCs recorded during Step L1.
z Was the continuous DTC retrieved during Step L1 an
intermittent fault? Yes
CHECK for causes
of intermittent
short to ground or
open on circuit
1083 (LB/BK).
Attempt to recreate
the hard fault by
flexing the wire
harness and
cycling the ignition
key frequently.
REPAIR any
intermittent
concerns found.
GO to
L6 .
No
GO to L6 .
L6 CHECK FOR ADDITIONAL DTCs
z
Refer to the continuous DTCs recorded during Step L1.
z Were any continuous DTCs retrieved during Step L1? Yes
Do not clear any
DTCs until all
DTCs have been
resolved. GO to
the Restraints
Control Module
(RCM) Diagnostic
Trouble Code
(DTC) Priority
Table in this
section for pinpoint
test direction.
No
RECONNECT the
system.
REACTIVATE the
system. PROVE
OUT the system.
REFER to
Air Bag Supplemental
Restraint System
(SRS) in this
section. CLEAR all
DTCs. Klj . 34 ba
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An air bag tone warning indicator circuit short to battery or ignition can be caused by:
za short to battery or ignition on circuit 1083 (LB/BK).
z a damaged or inoperative GEM.
z an RCM internal concern.
PINPOINT TEST M: DTC B1891 — AIR BAG TONE WARNING
INDICATOR CIRCUIT SHORTED TO BATTERY OR IGNITION Test Step Result / Action to
Take M1 CHECK FOR A HARD OR INTERMITTENT DTC
z
Key in OFF position.
z Connect the diagnostic tool. Scan Tool
z Key in ON position.
z Enter the following diagnostic mode on the diagnostic tool:
Retrieve/Clear Continuous DTCs.
z Retrieve and record any continuous DTCs for use later in this
pinpoint test.
z Enter the following diagnostic mode on the diagnostic tool: On-
Demand Self Test.
z Was DTC B1891 retrieved during the on- demand self test? Yes
This is a hard fault.
The fault condition
is still present. This
fault cannot be
cleared until it is
corrected and the
DTC is no longer
retrieved during
the on-
demand
self test. GO to
M2 .
No
This is an
intermittent fault.
The fault condition
is not present at
this time. GO to
M4 .
M2 CHECK THE AIR BAG TONE WARNING INDICATOR CIRCUIT
WARNING: If the supplemental restraint system (SRS) is
being serviced, the system must be deactivated and restraint
system diagnostic tools must be installed. Refer to Air Bag Supplemental Restraint System (SRS) in this section.
The air bag restraint system diagnostic tools must be removed
and the air bag modules reconnected when the system is
reactivated to avoid non- deployment in a collision, resulting in
possible personal injury. NOTE: Diagnostics or repairs are not to
be performed on a seat equipped with a seat side air bag with the
seat in the vehicle. Prior to attempting to diagnose or repair a seat
concern when equipped with a seat side air bag, the seat must be
removed from the vehicle and the restraint system diagnostic tools
must be installed in the seat side air bag electrical connectors. The
restraint system diagnostic tools must be removed prior to
operating the vehicle over the road. NOTE: After diagnosing or
repairing an SRS, the restraint system diagnostic tools must be
removed before operating the vehicle over the road. NOTE: After
diagnosing or repairing a seat system, the restraint system
diagnostic tools must be removed before operating the vehicle
over the road. NOTE: The SRS must be fully operational and free of
faults before releasing the vehicle to the customer. Yes
GO to
M3 .
No
REPAIR the
circuit. GO to M5 . Klj . 35 ba
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Pinpoint Test O: DTC B1870 —
Air Bag Indicator Shorted to Battery
Normal Operation
The air bag indicator is designed to illuminate for 6 (+/- 2) seconds when the ignition switch is turned to
the RUN position. This initial 6 seconds of illumination is considered normal operation and is called
proveout of the air bag indicator. The air bag indicator is then used to warn the driver that there is a
fault in the air bag supplemental restraint system (SRS).
While the air bag indicator is lit, the restraints control module (RCM) monitors the air bag indicator for
short to battery conditions. If the RCM detects a short to battery condition on the air bag indicator z
Is the resistance greater than 10 ohms? N5 CHECK FOR AN INTERMITTENT FAULT
z
Refer to the continuous DTCs recorded during Step N1.
z Was the continuous DTC retrieved during Step N1 an
intermittent fault? Yes
CHECK for causes
of intermittent
short to ground or
open on circuit 608
(BK/YE). Attempt
to recreate the
hard fault by
flexing the wire
harness and
cycling the ignition
key frequently.
REPAIR any
intermittent
concerns found.
GO to
N6 .
No
GO to N6 .
N6 CHECK FOR ADDITIONAL DTCs
z
Refer to the continuous DTCs recorded during Step N1.
z Were any continuous DTCs retrieved during Step N1? Yes
Do not clear any
DTCs until all
DTCs have been
resolved. GO to
the Restraints
Control Module
(RCM) Diagnostic
Trouble Code
(DTC) Priority
Table in this
section for pinpoint
test direction.
No
RECONNECT the
system.
REACTIVATE the
system. PROVE
OUT the system.
REFER to
Air Bag Supplemental
Restraint System
(SRS) in this
section. CLEAR all
DTCs. Klj . 40 ba
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